Assessment of the production of animal manure and its pollution potential in Hebei province

The production of animal manure,the amounts of nitrogen and phosphorus,and the chemical oxygen demand of the manure in Hebei province were analyzed based on statistical data and literatures.Results indicated that the mean amounts of animal manure,N,P produced were equivalent to 38 t,182 kg,54 kg/hm~2 of agricultural land,respectively in 2004.The mean amounts of COD_(Cr),BOD_5,NH_3-N in animal manure were 5.24,4.42,0.52 million tons,respectively.The production was spatially very uneven,suggesting that some areas,such as Shijiazhuang,Tangshan,Handan and Baoding,received much higher doses than the mean amounts.